Fly-exit fob scbeen doobs and windows



R. B. WATSON AND 1. c. KITTERMANII FLY EXIT FOR SCREEN DOORS ANDWINDOWS.

APPLICATION FILED SEPT. 23' I918.

Patented Sept. 2, 1919.

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UNITED STATES PATENT OFFICE.

ROBERT B. WATSON AND JESSE C. KIT'IEBMAN, 0F CORYDON, INDIANA.

FLY-EXIT FOR SCREEN DOORS AND WINDOWS.

Application filed September 23, 1918.

To all whom it may concern:

Beit known that we, ROBERT B. WATSON and Jnssn C. Krr'rnnMnx, citizensof the United States, residing at Corydon, in the county of Harrison,State of Indiana, have invented certain new and useful Improvements inFly-Exits for Screen Doors and Windows; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to new and useful improvements in fly exits andparticularly to fly exits for window and door screens.

One object of the present invention is to provide a novel and improveddevice of this character wherein provision is made whereby the flies,when crawling upwardly on the screen fabric can be trapped incompartments from which they cannot reenter the house.

Another object is to so construct a door or window of this class wherebythe flies can escape only to the outside, from the trappingcompartments.

Other objects and advantages will be apparent from the followingdescription when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation, partly broken away, of a screen door made inaccordance with our invention.

Fig. 2 is a vertical longitudinal sectional view through the door, takenin a plane parallel to the face of the door.

Fig. 3 is a vertical longitudinal sectional view taken on the staggeredline 33 of Fig. 1, showing the exit openings of the arcuate screenstrips.

Fig. 1 is a horizontal sectional view taken on the line 4-4 of Fig. 1.

Fig. 5 is a horizontal sectional view taken on the line 5-5 of Fig. 1.

Referring particularly to the accompanying drawing, 10 represents ascreen door frame which has secured. thereto the usual wire screenfabric 11. The lower portion of the door is divided by means of thetransverse rail 12 and the vertical rail 13. The screen fabric ispreferably secured to the outer face of the door for the purpose of thesuccessful operation of the invention. Secured to the inner faces of thea per rail 14,- and the side rails 15, of the cor, and

Specification of Letters Patent.

Patented Sept. 2, 1919.

Serial No. 255,321.

extending across approximately one-third of directed upwardly. The edgesof this strip.

are in firm contact with the inner faces of the screens 11 and 16, sothat there will be no spaces for the flies to pass therebetween.However, to permit the flies to get into the space between the arcuatestrip and the top rail of the door, there are cut the notches 18 in theopposite edges of the upper portion of the strip. Formed in the outerface of the'rail 14 and communicating with the space thus described, arethe grooves 19, through which the flies escape to the outside of thedoor. The screen retaining strip 20 covers, or bridges over, the lowerportions plf these grooves to prevent entrance of the ies.

Similarly secured to the lower portion of the door, and covering theupper part, below the cross rail 12, is a sheet of screen fabric 21.Arcuate strips of screen 22 are secured between the screens 11 and 21,in the same manner as the strip 17, with the convex faces directedupwardly. Each of the strips 22 is formed with the opposite exit notches23, in the upper portion thereof, in the same manner and for the samepurpose as the notches 18. In the outer face of the transverse strip orrail 12 there are formed the grooves 24 which communicate with the lowercompartments of the door, formed by the side rails 15. the rail 12 andthe rail 13, to permit the flies to escape to the outside.

It is well known that flies crawl upwardly in their efforts to escape,in so doing, they will pass through the notches 18 or 23 into the spacesabove the arcuate strips. By reason of this habit of the flies they willnot crawl downwardly into the house again, but will finally find an exitto the outside through the grooves.

This invention may readily be applied to any ordinary screen door by theattachment of the auxiliary screen members and the arcuate strips, theonly modification to the door being the cuttih of the grooves. Thus thecost of the menu acture will not exceed that of the ordinary screen doorto any appreciable extent.

What is claimed is: A screen .door including a frame, Wire screencovering the Outer face'of the door,

' copieuiof thiaspatent may berobtaine d for ing exit grooves and thetransverse middle ra11 of the frame havlng grooves communicatingWiththe-said compartments and the 15 outside of the door.

In testimony whereof We affix our'signa-- tures in the presence of tWoWitnesses.

ROBERT B. WATSON. JESSE o. KITTERMAN.

\Vitnesses:

SIDNEY R. BEANBLossoM, NELLIE BARRoW.

five cents each, by addressingthe ficommissioner 1011 Patents,Washington, D. 03" t

